Color-converting substrate including shared light-emitting areas, display device including the same and method for manufacturing the same

ABSTRACT

A color-converting substrate including light-emitting areas and a light-blocking area surrounding the light-emitting areas, the light-emitting areas including first light-emitting areas configured to emit a same color light and spaced apart from each other by the light-blocking area, a partition wall including a first opening continuously overlapping the first light-emitting areas and a first portion of the light-blocking area disposed between the first light-emitting areas, a first color-converting layer including a wavelength-converting material and disposed in the first opening to overlap the first light-emitting areas and the first portion of the light-blocking area, and a color filter layer including a portion configured to block a first color light emitted through the first light-emitting areas, the color filter layer overlapping the first color-converting layer and the first portion of the light-blocking area.

This application is a Continuation of U.S. patent application Ser. No.16/940,395, filed on Jul. 28, 2020, which claims priority from and thebenefit of Korean Patent Application No. 10-2019-0126016, filed on Oct.11, 2019, each of which is incorporated by reference for all purposes asif fully set forth herein.

BACKGROUND Field

Exemplary embodiments relate to a color-converting substrate, a displaydevice including the color-converting substrate, and a method formanufacturing the color-converting substrate.

DISCUSSION OF THE BACKGROUND

An organic light-emitting display device is a self-emission displaydevice, which is capable of generating a color image without anadditional light source, such as a backlight.

Recently, organic light-emitting display devices including a colorfilter and a color-converting layer are being developed for improving adisplay quality. The color-converting layer may change a wavelength oflight generated by a light-emitting element. Thus, the color-convertinglayer may output light having a color different from an incident light.For example, the color-converting layer may include awavelength-converting material, such as a quantum dot.

An inkjet printing method may be generally used for forming thecolor-converting layer including the quantum dot. However, when thecolor-converting layer is formed by an inkjet printing method, athickness of the color-converting layer may be irregular by distributionof ink drops due to an inkjet printing apparatus.

The above information disclosed in this Background section is only forunderstanding of the background of the inventive concepts, and,therefore, it may contain information that does not constitute priorart.

SUMMARY

Color-converting substrates constructed according to exemplaryembodiments of the invention are capable of providing a color-convertinglayer with improved thickness uniformity.

Exemplary embodiments provide a display device including thecolor-converting substrate, which may improve an image quality.

Exemplary embodiments also provide a method for manufacturing thecolor-converting substrate.

Additional features of the inventive concepts will be set forth in thedescription which follows, and in part will be apparent from thedescription, or may be learned by practice of the inventive concepts.

A color-converting substrate according to an exemplary embodimentincludes light-emitting areas and a light blocking area surrounding thelight-emitting areas, the light-emitting areas including firstlight-emitting areas configured to emit a first color light, a partitionwall including a first opening continuously overlapping the firstlight-emitting areas and a first portion of the light-blocking areadisposed between the first light-emitting areas, a firstcolor-converting layer including a wavelength-converting material anddisposed in the first opening to overlap the first light-emitting areasand the first portion of the light-blocking area, and a color filterlayer including a portion configured to block the first color light, thecolor filter layer overlapping the first color-converting layer and thefirst portion of the light-blocking area.

The light-emitting areas may further include second light-emitting areasconfigured to emit a second color light different from the first colorlight, and the color filter layer may include a first color filteroverlapping the first light-emitting areas and configured to transmitthe first color light, and a second color filter overlapping the secondlight-emitting areas and the first portion of the light-blocking areaand configured to transmit the second color light.

The first color filter may further overlap a second portion of thelight-blocking area disposed between the second light-emitting areas.

The color-converting substrate may further include a compensation layeroverlapping the second light-emitting areas and the second portion ofthe light-blocking area, and configured to transmit an incident lightwithout changing a wavelength of the incident light.

The light-emitting areas may further include third light-emitting areasconfigured to emit a third color light different from the first colorlight and the second color light, and the color filter layer may furtherinclude a third color filter overlapping the third light-emitting areasand configured to transmit the third color light, and a secondcolor-converting layer including a wavelength-converting material andoverlapping the third light-emitting areas and a third portion of thelight-blocking area disposed between the third light-emitting areas.

The first color light may be a red light, the second color light may bea blue light, and the third color light may be a green light.

The second color filter may further overlap the third portion of thelight-blocking area.

The third color filter may further overlap the third portion of thelight-blocking area.

The partition wall may further include a second opening in which thecompensation layer is disposed, and the first opening and the secondopening may have different sizes.

The first color filter may include a plurality of patterns spaced apartfrom each other and overlapping the first light-emitting areas,respectively.

The wavelength-converting material may include a quantum dot.

A method for manufacturing a display device according to anotherexemplary embodiment includes forming a first color filter transmittinga first color light on a base substrate to overlap first light-emittingareas, forming a second color filter transmitting a second color lightdifferent from the first color light to overlap second light-emittingareas and a first portion of a light-blocking area disposed between thefirst light-emitting areas, forming a partition wall including a firstopening continuously overlapping the first light-emitting areas and thefirst portion of the light-blocking area, providing a first compositionincluding a wavelength-converting material in the first opening, andcuring the first composition to form a first color-converting layer.

The wavelength-converting material may include a quantum dot.

The first composition may be provided in the first opening as ink dropsby an inkjet printing apparatus.

A display device according to still another exemplary embodimentincludes a first substrate including an array of pixels, a secondsubstrate combined with the first substrate and including light-emittingareas and a light-blocking area, the light-emitting areas includingfirst light-emitting areas configured to emit a first color light andsecond light-emitting areas configured to emit a second color lightdifferent from the first color light, in which the second substratefurther includes a partition wall including a first opening continuouslyoverlapping the first light-emitting areas and a first portion of thelight-blocking area disposed between the first light-emitting areas, afirst color-converting layer including a wavelength-converting materialand disposed in the first opening to overlap the first light-emittingareas and the first portion of the light-blocking area, a first colorfilter overlapping the first light-emitting areas and configured totransmit the first color light, and a second color filter overlappingthe second light-emitting areas and the first portion of thelight-blocking area and configured to transmit the second color light.

The first color filter may further overlap a second portion of thelight-blocking area disposed between the second light-emitting areas.

The second substrate may further include a compensation layeroverlapping the second light-emitting areas and the second portion ofthe light-blocking area, and configured to transmit an incident lightwithout changing a wavelength of the incident light.

The light-emitting areas may further include third light-emitting areasconfigured to emit a third different from the first color light and thesecond color light, and the second substrate may further include a thirdcolor filter overlapping the third light-emitting areas and configuredto transmit the third color light, and a second color-converting layerincluding a wavelength-converting material and overlapping the thirdlight-emitting areas and a third portion of the light-blocking areadisposed between the third light-emitting areas.

The first color light may be a red light, the second color light may bea blue light, and the third color light may be a green light.

The second color filter may further overlap the third portion of thelight-blocking area.

The first color filter may include a plurality of patterns spaced apartfrom each other and overlapping the first light-emitting areas,respectively.

The wavelength-converting material may include a quantum dot.

It is to be understood that both the foregoing general description andthe following detailed description are exemplary and explanatory and areintended to provide further explanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this specification, illustrate exemplary embodiments of theinvention, and together with the description serve to explain theinventive concepts.

FIG. 1 is a plan view illustrating a display device according to anexemplary embodiment.

FIG. 2 is a cross-sectional view taken along line I-I′ of FIG. 1 .

FIG. 3 is a cross-sectional view taken along line II-If of FIG. 1 .

FIG. 4 is a cross-sectional view taken along line of FIG. 1 .

FIG. 5 is a cross-sectional view taken along line IV-IV′ of FIG. 1 .

FIGS. 6A, 7A, 8A, and 9A are plan views illustrating a method formanufacturing a color-converting substrate according to an exemplaryembodiment.

FIGS. 6B, 7B, 8B, and 9B are cross-sectional views taken along line V-V′of FIGS. 6A, 7A, 8A, and 9A, respectively.

FIGS. 6C, 7C, 8C, and 9C are cross-sectional views taken along lineVI-VI′ of FIGS. 6A, 7A, 8A, and 9A, respectively.

FIG. 10A is a plan view illustrating a step of dropping ink in a methodfor manufacturing a color-converting substrate according to an exemplaryembodiment.

FIG. 10B is a cross-sectional view taken along line VII-VII′ of FIG.10A.

FIGS. 11 and 12 are plan views illustrating light-emitting areas and apartition wall of a color-converting substrate according to an exemplaryembodiment.

FIG. 13A is a plan view illustrating a color-converting substrateaccording to an exemplary embodiment.

FIG. 13B is a cross-sectional view taken along line VIII-VIII′ of FIG.13A.

FIG. 13C is a cross-sectional view taken along line IX-IX′ of FIG. 13A.

FIG. 14A is a plan view illustrating a color-converting substrateaccording to an exemplary embodiment.

FIG. 14B is a cross-sectional view taken along line X-X′ of FIG. 14A.

FIG. 14C is a cross-sectional view taken along line XI-XI′ of FIG. 14A.

FIG. 15 is a cross-sectional view illustrating a display deviceaccording to an exemplary embodiment.

DETAILED DESCRIPTION

In the following description, for the purposes of explanation, numerousspecific details are set forth in order to provide a thoroughunderstanding of various exemplary embodiments or implementations of theinvention. As used herein “embodiments” and “implementations” areinterchangeable words that are non-limiting examples of devices ormethods employing one or more of the inventive concepts disclosedherein. It is apparent, however, that various exemplary embodiments maybe practiced without these specific details or with one or moreequivalent arrangements. In other instances, well-known structures anddevices are shown in block diagram form in order to avoid unnecessarilyobscuring various exemplary embodiments. Further, various exemplaryembodiments may be different, but do not have to be exclusive. Forexample, specific shapes, configurations, and characteristics of anexemplary embodiment may be used or implemented in another exemplaryembodiment without departing from the inventive concepts.

Unless otherwise specified, the illustrated exemplary embodiments are tobe understood as providing exemplary features of varying detail of someways in which the inventive concepts may be implemented in practice.Therefore, unless otherwise specified, the features, components,modules, layers, films, panels, regions, and/or aspects, etc.(hereinafter individually or collectively referred to as “elements”), ofthe various embodiments may be otherwise combined, separated,interchanged, and/or rearranged without departing from the inventiveconcepts.

The use of cross-hatching and/or shading in the accompanying drawings isgenerally provided to clarify boundaries between adjacent elements. Assuch, neither the presence nor the absence of cross-hatching or shadingconveys or indicates any preference or requirement for particularmaterials, material properties, dimensions, proportions, commonalitiesbetween illustrated elements, and/or any other characteristic,attribute, property, etc., of the elements, unless specified. Further,in the accompanying drawings, the size and relative sizes of elementsmay be exaggerated for clarity and/or descriptive purposes. When anexemplary embodiment may be implemented differently, a specific processorder may be performed differently from the described order. Forexample, two consecutively described processes may be performedsubstantially at the same time or performed in an order opposite to thedescribed order. Also, like reference numerals denote like elements.

When an element, such as a layer, is referred to as being “on,”“connected to,” or “coupled to” another element or layer, it may bedirectly on, connected to, or coupled to the other element or layer orintervening elements or layers may be present. When, however, an elementor layer is referred to as being “directly on,” “directly connected to,”or “directly coupled to” another element or layer, there are nointervening elements or layers present. To this end, the term“connected” may refer to physical, electrical, and/or fluid connection,with or without intervening elements. Further, the D1-axis, the D2-axis,and the D3-axis are not limited to three axes of a rectangularcoordinate system, such as the x, y, and z—axes, and may be interpretedin a broader sense. For example, the D1-axis, the D2-axis, and theD3-axis may be perpendicular to one another, or may represent differentdirections that are not perpendicular to one another. For the purposesof this disclosure, “at least one of X, Y, and Z” and “at least oneselected from the group consisting of X, Y, and Z” may be construed as Xonly, Y only, Z only, or any combination of two or more of X, Y, and Z,such as, for instance, XYZ, XYY, YZ, and ZZ. As used herein, the term“and/or” includes any and all combinations of one or more of theassociated listed items.

Although the terms “first,” “second,” etc. may be used herein todescribe various types of elements, these elements should not be limitedby these terms. These terms are used to distinguish one element fromanother element. Thus, a first element discussed below could be termed asecond element without departing from the teachings of the disclosure.

Spatially relative terms, such as “beneath,” “below,” “under,” “lower,”“above,” “upper,” “over,” “higher,” “side” (e.g., as in “sidewall”), andthe like, may be used herein for descriptive purposes, and, thereby, todescribe one elements relationship to another element(s) as illustratedin the drawings. Spatially relative terms are intended to encompassdifferent orientations of an apparatus in use, operation, and/ormanufacture in addition to the orientation depicted in the drawings. Forexample, if the apparatus in the drawings is turned over, elementsdescribed as “below” or “beneath” other elements or features would thenbe oriented “above” the other elements or features. Thus, the exemplaryterm “below” can encompass both an orientation of above and below.Furthermore, the apparatus may be otherwise oriented (e.g., rotated 90degrees or at other orientations), and, as such, the spatially relativedescriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particularembodiments and is not intended to be limiting. As used herein, thesingular forms, “a,” “an,” and “the” are intended to include the pluralforms as well, unless the context clearly indicates otherwise. Moreover,the terms “comprises,” “comprising,” “includes,” and/or “including,”when used in this specification, specify the presence of statedfeatures, integers, steps, operations, elements, components, and/orgroups thereof, but do not preclude the presence or addition of one ormore other features, integers, steps, operations, elements, components,and/or groups thereof. It is also noted that, as used herein, the terms“substantially,” “about,” and other similar terms, are used as terms ofapproximation and not as terms of degree, and, as such, are utilized toaccount for inherent deviations in measured, calculated, and/or providedvalues that would be recognized by one of ordinary skill in the art.

Various exemplary embodiments are described herein with reference tosectional and/or exploded illustrations that are schematic illustrationsof idealized exemplary embodiments and/or intermediate structures. Assuch, variations from the shapes of the illustrations as a result, forexample, of manufacturing techniques and/or tolerances, are to beexpected. Thus, exemplary embodiments disclosed herein should notnecessarily be construed as limited to the particular illustrated shapesof regions, but are to include deviations in shapes that result from,for instance, manufacturing. In this manner, regions illustrated in thedrawings may be schematic in nature and the shapes of these regions maynot reflect actual shapes of regions of a device and, as such, are notnecessarily intended to be limiting.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this disclosure is a part. Terms,such as those defined in commonly used dictionaries, should beinterpreted as having a meaning that is consistent with their meaning inthe context of the relevant art and should not be interpreted in anidealized or overly formal sense, unless expressly so defined herein.

A color-converting substrate, a display device, and a method formanufacturing a color-converting substrate according to exemplaryembodiments of the invention will be described hereinafter withreference to the accompanying drawings, in which some exemplaryembodiments are shown. Same or similar reference numerals may be usedfor same or similar elements in the drawings.

FIG. 1 is a plan view illustrating a display device according to anexemplary embodiment. FIG. 2 is a cross-sectional view taken along lineI-I′ of FIG. 1 .

Referring to FIGS. 1 and 2 , a display device according to an exemplaryembodiment includes a first substrate 100 and a second substrate 200.The first substrate 100 includes an array of pixels. Each pixel mayinclude a light-emitting element generating light in response to adriving signal.

The second substrate 200 includes a color-converting layer changing awavelength of light generated by the light-emitting element.Furthermore, the second substrate 200 includes a color filtertransmitting light having a specific color.

Referring to FIG. 1 , the display device may include a display areagenerating an image and a peripheral area surrounding the display area.The display area may include a light-emitting area emitting light and alight-blocking area BA surrounding the light-emitting area. Lightgenerated in the display device may exit outwardly through thelight-emitting area.

The light-emitting area may emit light having different colors. Forexample, the display device may include a first light-emitting area LA1emitting a first color light, a second light-emitting area LA2 emittinga second color light, and a third light-emitting area LA3 emitting athird color light.

In an exemplary embodiment, light-emitting areas emitting light havingthe same color may be arranged along a first direction D1, andlight-emitting areas emitting light having different colors may bearranged along a second direction D2 crossing the first direction D1.For example, the first direction D1 may be a column direction, and thesecond direction D2 may be a row direction.

For example, the first light-emitting area LA1, the secondlight-emitting area LA2, and the third light-emitting area LA3 may bearranged to have a same center line along a row direction. However, theinventive concepts are not limited thereto. For example, in someexemplary embodiments, the first light-emitting area LA1, the secondlight-emitting area LA2, and the third light-emitting area LA3 may beshifted from each other to have different center lines along a rowdirection.

In an exemplary embodiment, the first light-emitting area LA1 may emit ared light, the second light-emitting area LA2 may emit a blue light, andthe third light-emitting area LA3 may emit a green light. However, theinventive concepts are not limited thereto. For example, in someexemplary embodiments, the light-emitting areas may be configured orcombined to emit a yellow light, cyan light, and a magenta light.

Furthermore, in another exemplary embodiment, the light-emitting areasmay emit at least four color lights. For example, light-emitting areasmay be configured or combined emit at least one of emit a yellow light,cyan light, and a magenta light in addition to a red light, a blue lightand a green light. Furthermore, light-emitting areas may be configuredor combined to further emit a white light.

In an exemplary embodiment, the light emitting areas may havesubstantially a rectangular shape, respectively. However, the inventiveconcepts are not limited thereto. For example, in some exemplaryembodiments, the light emitting areas may have different shapes fromeach other. Furthermore, the light emitting areas may have variousshapes, such as substantially a square shape, a rhombus shape, atriangular shape, a circular shape or the like. An edge or a corner ofeach light emitting area may have a round shape or may be chamfered.

In an exemplary embodiment, the light emitting areas may have differentsizes from each other. For example, the first light-emitting area LA1emitting a red light may have a larger size than the secondlight-emitting area LA2 emitting a blue light and the thirdlight-emitting area LA3 emitting a green light. Furthermore, the thirdlight-emitting area LA3 may have a larger size than the secondlight-emitting area LA2.

However, the inventive concepts are not limited thereto. For example, insome exemplary embodiments, the light emitting areas may have the samesize.

Referring to FIG. 2 , the first substrate 100 includes a driving elementTR disposed on a base substrate 110. The driving element TR may beelectrically connected to a corresponding light-emitting element. Thelight-emitting element may be an organic light-emitting diode, forexample. According to an exemplary embodiment, the organiclight-emitting diode may include a first electrode EL1, a secondelectrode EL2, and a light-emitting layer disposed OL between the firstelectrode EL1 and the second electrode EL2.

For example, the base substrate 110 may include glass, quartz, sapphire,a polymeric material or the like.

In an exemplary embodiment, the driving element TR may include a thinfilm transistor. The driving element TR may include a plurality of thinfilm transistors.

For example, a channel layer of the thin film transistor may includeamorphous silicon, multi-crystalline silicon (polysilicon), or a metaloxide. For example, the metal oxide may be a two-component compound(AB_(x)), ternary compound (AB_(x)C_(y)), or four-component compound(AB_(x)C_(y)D_(z)), which may include indium (In), zinc (Zn), gallium(Ga), tin (Sn), titanium (Ti), aluminum (Al), hafnium (Hf), zirconium(Zr), magnesium (Mg). For example, the metal oxide may include zincoxide (ZnO_(x)), gallium oxide (GaO_(x)), titanium oxide (TiO_(x)), tinoxide (SnO_(x)), indium oxide (InO_(x)), indium-gallium oxide (IGO),indium-zinc oxide (IZO), indium tin oxide (ITO), gallium zinc oxide(GZO), zinc magnesium oxide (ZMO), zinc tin oxide (ZTO), zinc zirconiumoxide (ZnZr_(x)O_(y)), indium-gallium-zinc oxide (IGZO), indium-zinc-tinoxide (IZTO), indium-gallium-hafnium oxide (IGHO), tin-aluminum-zincoxide (TAZO), indium-gallium-tin oxide (IGTO) or the like.

The driving element TR may be covered by an insulation structure 120.The insulation structure 120 may include a combination of an inorganicinsulation layer and an organic insulation layer.

The first electrode EL1 may function as an anode. For example, the firstelectrode EL1 may be formed as a transmitting electrode or a reflectingelectrode according to an emission type of the display device (e.g., afront emission type or a rear emission type). When the first electrodeEL1 is a reflecting electrode, the first electrode EL1 may include gold(Au), silver (Ag), aluminum (Al), copper (Cu), nickel (Ni), platinum(Pt), magnesium (Mg), chromium (Cr), tungsten (W), molybdenum (Mo),titanium (Ti) or a combination thereof, and may have a stacked structurefurther including a metal oxide layer including indium tin oxide, indiumzinc oxide, zinc tin oxide, indium oxide, zinc oxide, tin oxide or thelike.

The pixel-defining layer PDL is disposed on the insulation structure120, and has an opening overlapping at least a portion of the firstelectrode EL1. For example, the pixel-defining layer PDL may include anorganic insulating material. At least a portion of the light-emittinglayer OL may be disposed in the opening of the pixel-defining layer PDL.In an exemplary embodiment, the light-emitting layer OL may extendcontinuously over a plurality of pixels in the display area. In anotherexemplary embodiment, the light-emitting layer OL may be formed as apattern separated from a light-emitting layer of an adjacent pixel.

The light-emitting layer OL may include at least an organiclight-emitting layer, and may further include at least one of a holeinjection layer (HIL), a hole transporting layer (HTL), an electrontransporting layer (ETL), and an electron injection layer (EIL). Forexample, the light-emitting layer OL may include a low molecular weightorganic compound or a high molecular weight organic compound.

In an exemplary embodiment, the light-emitting layer OL may generate ablue light. However, the inventive concepts are not limited thereto. Forexample, in some exemplary embodiments, the light-emitting layer OL maygenerate a red light, a green light or the like. In another exemplaryembodiment, the light-emitting layer OL may generate light havingdifferent colors in different pixels.

The second electrode EL2 may be formed as a transmitting electrode or areflecting electrode according to an emission type of the displaydevice. For example, the second electrode EL2 may include metal, a metalalloy, a metal nitride, a metal fluoride, a conductive metal oxide or acombination thereof. For example, the second electrode EL2 may be formedas a common layer extending continuously over a plurality of pixels inthe display area.

The first substrate 100 may further include an encapsulation layer 130covering light-emitting elements. The encapsulation layer 130 may extendcover an entire portion of the display area.

For example, the encapsulation layer 130 may have a stacked structure ofan inorganic thin film and an organic thin film. As illustrated in FIG.2 , the encapsulation layer 130 according to an exemplary embodiment mayinclude a first inorganic thin film 132, an organic thin film 134disposed on the first inorganic thin film 132, and a second inorganicthin film 136 disposed on the organic thin film 134. However, theinventive concepts are not limited thereto. For example, in someexemplary embodiments, the encapsulation layer 130 may have a structureincluding at least two organic thin films and at least three inorganicthin films.

For example, the organic thin film 134 may include a cured resin, suchas polyacrylate or the like. For example, the cured resin may be formedfrom cross-linking reaction of monomers. For example, the inorganic thinfilms 132 and 136 may include an inorganic material, such as siliconoxide, silicon nitride, silicon carbide, aluminum oxide, tantalum oxide,hafnium oxide, zirconium oxide, titanium oxide or the like.

The second substrate 200 includes a color-converting layer. Thecolor-converting layer changes a wavelength of light L1 generated by thelight-emitting element of the first substrate 100, and emits lighthaving a color different from the incident light L1. Furthermore, thesecond substrate 200 includes a color filter layer overlapping thecolor-converting layer.

The color filter layer may be disposed between a base substrate 210 andthe color-converting layer. The color filter layer filters light passingthrough the color filter to transmit light having a specific color.

In an exemplary embodiment, the color filter layer may include a firstcolor filter 222, a second color filter 224, and a third color filter226. The color filters may overlap a corresponding light-emitting area.Thus, a color of lights L2R, L2B, L2G exiting from the light-emittingareas may be determined by the color filters.

In an exemplary embodiment, the first color filter 222 overlaps thefirst light-emitting area LA1. For example, the first color filter 222may selectively transmit a red light. The second color filter 224overlaps the second light-emitting area LA2. For example, the secondcolor filter 224 may selectively transmit a blue light. The third colorfilter 226 overlaps the third light-emitting area LA3. For example, thethird color filter 226 may selectively transmit a green light.

The second color filter 224 may include a transmitting portion, whichoverlaps the second light-emitting area LA2, and a light-blockingportion overlapping the light-blocking area BA. In an exemplaryembodiment, the light-blocking portion of the second color filter 224may be formed to entirely overlap the light-blocking area BA. Thelight-blocking portion of the second color filter 224 may function as alight-blocking member blocking light having a different color from lighttransmitted by the second color filter 224.

In an exemplary embodiment, the second color filter 224 may have anopening corresponding to the first light-emitting area LA1 and the thirdlight-emitting area LA3. The second color filter 224 may partiallyoverlap the first color filter 222 and the third color filter 226.

The second substrate 200 may include a first protective layer 240covering the color filter layer. The first protective layer 240 mayinclude an inorganic material, such as silicon oxide, silicon nitride orthe like.

The color-converting layer overlaps a corresponding light-emitting area.For example, the second substrate 200 may include a firstcolor-converting layer 232 overlapping the first light-emitting areaLA1.

The first color-converting layer 232 may include a wavelength-convertingmaterial 232 a and a resin part 232 b.

For example, the wavelength-converting material 232 a may include aquantum dot. The quantum dot may be defined as a nano-crystallinesemiconductor material. The quantum dot may absorb incident light andemit light having a wavelength different from that of the incidentlight. For example, the quantum dot may have a diameter equal to or lessthan about 100 nm. In an exemplary embodiment, the quantum dot may havea diameter of about 1 nm to about 20 nm.

For example, the quantum dot may include a II-VI group compound, a III-Vgroup compound, a IV-VI group compound, a IV group element, a IV groupcompound or a combination thereof.

For example, the II-VI group compound may include a binary compoundselected from CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe,MgS and a combination thereof, a ternary compound selected from CdSeS,CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS,CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe,MgZnS and a combination thereof, or a quaternary compound selected fromHgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe,HgZnSeS, HgZnSeTe, HgZnSTe and a combination thereof.

For example, the III-V group compound may include a binary compoundselected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP,InAs, InSb and a combination thereof, a ternary compound selected fromGaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AINAs, AlNSb, AlPAs, AlPSb,InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP and a combination thereof, or aquaternary compound selected from GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb,GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb,InAlPAs, InAlPSb and a combination thereof.

For example, the IV-VI group compound may include a binary compoundselected from SnS, SnSe, SnTe, PbS, PbSe, PbTe and a combinationthereof, a ternary compound selected from SnSeS, SnSeTe, SnSTe, PbSeS,PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and a combination thereof, or aquaternary compound selected from SnPbSSe, SnPbSeTe, SnPbSTe and acombination thereof.

For example, the IV group element may include Si, Ge or a combinationthereof. The IV group compound may include a binary compound selectedfrom SiC, SiGe and a combination thereof.

For example, the quantum dot may have a core-shell structure including acore and a shell which surrounds the core. In an exemplary embodiment,for example, the core and the shell may include different materials.

For example, the quantum dot may be dispersed in the resin part 232 b.For example, the resin part 232 b may include an epoxy resin, an acrylicresin, a phenolic resin, a melamine resin, a cardo resin, an imide resinor the like.

The first color-converting layer 232 may further include a scatteringparticle 232 c. The scattering particle 232 c may scatter incident lightwithout substantially changing a wavelength of the incident light.

The scattering particle 232 c may include a metal oxide or an inorganicmaterial. For example, the metal oxide may include titanium oxide,zirconium oxide, aluminum oxide, indium oxide, zinc oxide, tin oxide orthe like. For example, the organic material may include an acrylicresin, an urethane resin or the like.

For example, a light-emitting diode corresponding to the firstlight-emitting area LA1 may generate a blue light L1 having a peak in arange of about 440 nm to about 480 nm. The first color-converting layer232 changes a wavelength of the blue light L1 incident thereon to emit ared light. A remainder of the blue light L1, which is not color-changedin the first color-converting layer 232, is blocked by the first colorfilter 222. As such, the first light-emitting area LA1 may selectivelyemit a red light L2R. For example, the red light L2R may have a peak ina range of about 610 nm to about 650 nm.

The second substrate 200 may further include a second color-convertinglayer 234 overlapping the third light-emitting area LA3. The secondcolor-converting layer 234 may include a wavelength-converting material234 a and a resin part 234 b.

For example, a light-emitting diode corresponding to the thirdlight-emitting area LA3 may generate a blue light L1. The secondcolor-converting layer 234 changes a wavelength of the blue light L1incident thereon to emit a green light. A remainder of the blue lightL1, which is not color-changed in the second color-converting layer 234,is blocked by the third color filter 226. As such, the thirdlight-emitting area LA3 may selectively emit a green light L2G. Forexample, the green light L2G may have a peak in a range of about 510 nmto about 550 nm.

The second substrate 200 may further include a compensation layer 238overlapping the second light-emitting area LA2. The compensation layer238 may not include a wavelength-converting material. As such, the bluelight L1 entering the compensation layer 238 may pass through thecompensation layer 238 to enter the second color filter 224 withoutsubstantially changing a color thereof. As such, the secondlight-emitting area LA2 may emit a blue light L2B.

The compensation layer 238 may include a resin part 238 b. For example,the resin part 238 b may include substantially the same material as theresin parts 232 b and 234 b of the color-converting layers 232 and 234.The compensation layer 238 may further include a scattering particle 238a.

The second substrate 200 includes a partition wall 250 surrounding thecolor-converting layers 232 and 234 and the compensation layer 238. Thepartition wall 250 may form a space receiving an ink composition forforming the color-converting layers 232 and 234 and the compensationlayer 238. As such, the partition wall 250 may have a grid shape or amatrix shape, in a plan view.

For example, the partition wall 250 may include an organic material,such as an epoxy resin, a phenolic resin, an acrylic resin, a siliconeresin or the like.

In an exemplary embodiment, the partition wall 250 may include alight-blocking material to function as a black matrix. For example, atleast a portion of the partition wall 250 may include a light-blockingmaterial, such as a pigment, a dye, a carbon black or the like. Forexample, the partition wall 250 may overlap a portion of thelight-blocking area BA.

The second substrate 200 may include a second protective layer 260covering the color-converting layers 232 and 234, the compensation layer238, and the partition wall 250. The second protective layer 260 mayinclude an inorganic material, such as silicon oxide, silicon nitride orthe like.

A filling member 300 may be disposed between the first substrate 100 andthe second substrate 200. The filling member 300 may include an organicmaterial, such as a silicone resin, an epoxy resin or the like.Furthermore, the filling member 300 may include an appropriate materialfor matching a refractive index.

FIG. 3 is a cross-sectional view taken along line II-II′ of FIG. 1 .FIG. 4 is a cross-sectional view taken along line of FIG. 1 . FIG. 5 isa cross-sectional view taken along line IV-IV′ of FIG. 1 .

FIGS. 3, 4, and 5 illustrated a second substrate of a display deviceaccording to an exemplary embodiment. In particular, FIG. 3 illustratesa light-blocking area disposed between adjacent light-emitting areasemitting the same color light. FIGS. 4 and 5 illustrate adjacentlight-emitting areas emitting the same color light and a light-blockingarea BA disposed therebetween.

Referring to FIGS. 1, 3, and 4 , first light-emitting areas LA1 emittinga red light may be spaced apart from each other along a first directionD1. A light-blocking area BA disposed between the adjacent firstlight-emitting areas LA1 may extend along a second direction D2.

The first color filter 222 may continuously overlap the adjacent firstlight-emitting areas LA1. However, the inventive concepts are notlimited thereto. For example, in some exemplary embodiments, the firstcolor filter 222 may include two separated patterns, which respectivelyoverlap the adjacent first light-emitting areas LA1.

In an exemplary embodiment, the partition wall 250 is not disposed inthe light-blocking area BA disposed between the adjacent firstlight-emitting areas LA1. As such, the first color-converting layer 232may continuously overlap the adjacent first light-emitting areas LA1.More particularly, the first color-converting layer 232 may overlap thelight-blocking area BA disposed between the adjacent firstlight-emitting areas LA1.

In an exemplary embodiment, the partition wall 250 is not disposed inthe light-blocking area BA disposed between adjacent thirdlight-emitting areas LA3. As such, the second color-converting layer 234may continuously overlap the adjacent third light-emitting areas LA3.More particularly, the second color-converting layer 234 may overlap thelight-blocking area BA disposed between the adjacent thirdlight-emitting areas LA3.

In an exemplary embodiment, the light-blocking area BA disposed betweenthe adjacent first light-emitting areas LA1 may overlap the second colorfilter 224. The second color filter 224 may extend to overlap thelight-blocking area BA disposed between the adjacent thirdlight-emitting areas LA3.

Referring to FIG. 5 , the partition wall 250 is not disposed in thelight-blocking area BA disposed between adjacent second light-emittingareas LA2. As such, the compensation layer 238 may continuously overlapthe adjacent second light-emitting areas LA2. More particularly, thecompensation layer 238 may overlap the light-blocking area BA disposedbetween the adjacent second light-emitting areas LA2.

In an exemplary embodiment, a portion of the first color filter 222 mayoverlap the light-blocking area BA disposed between the adjacent secondlight-emitting areas LA2.

For example, the first light-emitting areas LA1 emit a red light. Thesecond color filter 224 disposed between the first light-emitting areasLA1 selectively transmits a blue light. In this manner, a red lightgenerated from one first light-emitting area LA1 may be prevented fromexiting through an adjacent first light-emitting area LA1.

For example, the second light-emitting areas LA2 emit a blue light. Thefirst color filter 222 disposed between the second light-emitting areasLA2 selectively transmits a red light. In this manner, a blue lightgenerated from one second light-emitting area LA2 may be prevented fromexiting through an adjacent second light-emitting area LA2.

For example, the third light-emitting areas LA3 emit a green light. Thesecond color filter 224 disposed between the third light-emitting areasLA3 selectively transmits a blue light. In this manner, a green lightgenerated from a third light-emitting area LA3 may be prevented fromexiting through an adjacent third light-emitting area LA3.

FIGS. 6A to 10B illustrate a method for manufacturing a color-convertingsubstrate according to an exemplary embodiment. In particular, FIGS. 6A,7A, 8A, and 9A are plan views illustrating a method for manufacturing acolor-converting substrate according to an exemplary embodiment. FIGS.6B, 7B, 8B, and 9B are cross-sectional views taken along line V-V′ ofFIGS. 6A, 7A, 8A, and 9A. FIGS. 6C, 7C, 8C, and 9C are cross-sectionalviews taken along line VI-VI′ of FIGS. 6A, 7A, 8A, and 9A. FIG. 10A is aplan view illustrating a step of dropping ink in a method formanufacturing a color-converting substrate according to an exemplaryembodiment. FIG. 10B is a cross-sectional view taken along line VII-VII′of FIG. 10A.

Referring to FIGS. 6A, 6B, and 6C, a second color filter 224 is formedon a base substrate 210. The second color filter 224 may overlap asecond light-emitting area LA2. Furthermore, the second color filter 224may overlap a light-blocking area BA adjacent to a first light-emittingarea LA1 and a third light-emitting area LA3. Furthermore, the secondcolor filter 224 may overlap the light-blocking area BA between adjacentfirst light-emitting areas LA1 and between adjacent third light-emittingareas LA3.

In an exemplary embodiment, the second color filter 224 may be a bluefilter selectively transmitting a blue light. For example, the secondcolor filter 224 may be formed from a color filter composition includinga blue pigment and/or a blue dye.

Referring to FIGS. 7A, 7B, and 7C, a first color filter 222 is formed onthe base substrate 210 and the second color filter 224.

The first color filter 222 overlaps the first light-emitting areas LA1.Furthermore, the first color filter 222 may overlap the light-blockingarea BA between adjacent second light-emitting areas LA2.

In an exemplary embodiment, the first color filter 222 may be a redfilter selectively transmitting a red light. For example, the firstcolor filter 222 may be formed from a color filter composition includinga red pigment and/or a red dye.

Referring to FIGS. 8A, 8B, and 8C, a third color filter 226 is formed onthe base substrate 210 and the second color filter 224.

The third color filter 226 overlaps the third light-emitting areas LA3.

In an exemplary embodiment, the third color filter 226 may be a greenfilter selectively transmitting a green light. For example, the thirdcolor filter 226 may be formed from a color filter composition includinga green pigment and/or a green dye.

In exemplary embodiments, an order of forming the color filters andposition thereof are not limited to those shown in FIG. 6A to 8C. Forexample, in some exemplary embodiments, the first color filter 222 orthe third color filter 226 may be formed prior to the second colorfilter 224, so that the first color filter 222 or the third color filter226 may be disposed between the second color filter 224 and the basesubstrate 210.

Referring to FIGS. 9A, 9B, and 9C, a first protective layer 240 isformed to cover the color filter layer. A partition wall 250 is formedon the first protective layer 240. In some exemplary embodiments, thefirst protective layer 240 may be omitted. In FIG. 9A, the firstprotective layer 240 is not shown to illustrate the configurationunderlying the first protective layer 240.

The partition wall 250 may overlap the light-blocking area BA betweenlight-emitting areas emitting different color lights. The partition wall250 may include an opening overlapping the light-emitting areas.

For example, the partition wall 250 may include a first opening OP1overlapping adjacent first light-emitting areas LA1, a second openingOP2 overlapping adjacent second light-emitting areas LA2, and a thirdopening OP3 overlapping adjacent third light-emitting areas LA3.

In an exemplary embodiment, the first opening OP1 may have a shapeextending along the first direction D1 to continuously overlap theadjacent first light-emitting areas LA1 and the light-blocking area BAbetween the adjacent first light-emitting areas LA1. The second openingOP2 may have a shape extending along the first direction D1 tocontinuously overlap the adjacent second light-emitting areas LA2 andthe light-blocking area BA between the adjacent second light-emittingareas LA2. The third opening OP3 may have a shape extending along thefirst direction D1 to continuously overlap the adjacent thirdlight-emitting areas LA3 and the light-blocking area BA between theadjacent third light-emitting areas LA3.

Referring to FIGS. 10A and 10B, an ink including a wavelength-convertingmaterial is provided in the openings of the partition wall 250.

For example, an inkjet printing apparatus may be used for dropping theink. The inkjet printing apparatus may include a head 400 including aplurality of nozzles 410.

The inkjet printing apparatus may provide a composition in the openingsOP1, OP2, and OP3 of the partition wall 250 through the nozzle 410 ofthe head 400. For example, the inkjet printing apparatus may include afirst head providing a first composition in the first opening OP1, asecond head providing a second composition in the second opening OP2,and a third head providing a third composition in the third opening OP3,

In an exemplary embodiment, the first and third compositions may includea wavelength-converting material. For example, the first and thirdcompositions may include a wavelength-converting material, a bindercomponent, and a solvent.

For example, the wavelength-converting material may include a quantumdot. In an exemplary embodiment, the first composition may include aquantum dot capable of emitting a red light, and the third compositionmay include a quantum dot capable of emitting a green light. The quantumdots may include an organic ligand combined with a surface thereof.

The binder component may include a polymer, a polymerizable monomer or acombination thereof. For example, the polymer may include an aromaticring structure in a main chain thereof. For example, the aromatic ringstructure may include a phenylene group, a biphenylene group, a fluoreneor the like. The polymerizable monomer may contain at least one doublebond between carbon atoms. For example, the polymerizable monomer mayinclude a (meth)acrylate compound.

The solvent may be properly selected or combined from known materials inview of compatibility with other components, dispersion of a quantumdot, a viscosity, a boiling point or the like.

In some exemplary embodiments, the first and third compositions mayfurther include a scattering particle, a photo-initiator, a polymerstabilizer, a leveling agent, a coupling agent or a combination thereof.

The second composition may include the same material as the first andthird compositions, except for excluding the wavelength-convertingmaterial. For example, the second composition may include a bindercomponent and a solvent, and may further include a scattering particle,a photo-initiator, a polymer stabilizer, a leveling agent, a couplingagent or a combination thereof.

The inkjet printing apparatus provide ink drops including acorresponding composition in the openings OP1, OP2 and OP3. As such, theopenings OP1, OP2 and OP3 may be filled with the correspondingcomposition.

The number of the ink drops provided in the openings OP1, OP2 and OP3may be determined by a total volume of an opening and a volume of asingle ink drop. In an exemplary embodiment, the ink drops provided inthe openings OP1, OP2 and OP3 may be output by the nozzles 410. Forexample, the ink drops provided in the openings OP1, OP2 and OP3 may beoutput by different nozzles 410.

The compositions provided in the openings OP1, OP2 and OP3 may be curedto form a color-converting layer and a compensation layer. For example,the compositions may be cured by heat and light.

The nozzles 410 of the inkjet printing apparatus may be set to outputink drops having a predetermined volume. However, an actual volume ofthe ink drops may be different from the predetermined volume. Thus, theink drops may have volume distribution. In this case, thecolor-converting layer and the compensation layer may have a thicknessdistribution, which may deteriorate display quality.

According to exemplary embodiments, a partition wall is not disposed ina light-blocking area between adjacent light-emitting areas emitting thesame light. As such, the total number of ink drops provided in eachopening of the partition wall may be increased. For example, the totalnumber of ink drops provided in the expanded opening commonlyoverlapping a plurality of light-emitting areas may be more than twicethe total number of ink drops provided in an opening overlapping only asingle light-emitting area. In this manner, volume distribution of theink drops may be reduced. Accordingly, the color-converting layer andthe compensation layer formed in the expanded opening according to anexemplary embodiment may have a reduced thickness distribution.

Furthermore, a color filter having a different color from an outputlight of an adjacent light-emitting area is disposed in thelight-blocking area where the partition wall is removed. As such,deterioration of a display quality due to light leakage may beprevented.

In an exemplary embodiment, an opening of the partition wall maycontinuously overlap two light-emitting areas. However, the inventiveconcepts are not limited thereto. For example, openings OP1, OP2 and OP3of a partition wall 250 may continuously overlap at least threelight-emitting areas, respectively, as illustrated in FIG. 11 .Furthermore, openings OP1, OP2 and OP3 of the partition wall 250 mayhave sizes different from each other, or may be shifted in a direction,in view of colors of light-emitting areas and display characteristics,as illustrated in FIG. 12 .

FIG. 13A is a plan view illustrating a color-converting substrateaccording to an exemplary embodiment. FIG. 13B is a cross-sectional viewtaken along line VIII-VIII′ of FIG. 13A. FIG. 13C is a cross-sectionalview taken along line IX-IX′ of FIG. 13A. For ease of explanation, acolor-converting layer and a compensation layer are not shown in FIGS.13A to 13C.

Referring to FIGS. 13A, 13B, and 13C, first light-emitting areas LA1 maybe arranged along a first direction D1. Second light-emitting areas LA2and third light-emitting area LA3, which emit light having a colordifferent from the first light-emitting areas LA1, may be arranged alonga second direction D2 perpendicular to the first direction D1. In FIG.13A, the first protective layer 240 is not shown to illustrated aconfiguration underlying the first protective layer 240.

The first light-emitting area LA1 may overlap a first color filter 222selectively transmitting a first color light. The second light-emittingarea LA2 may overlap a second color filter 224 selectively transmittinga second color light. The third light-emitting area LA3 may overlap athird color filter 226 selectively transmitting a third color light. Thefirst color light may be a red light, the second color light may be ablue light, and the third color light may be a green light.

A partition wall 250 is disposed on the color filter layer. Thepartition wall 250 has an opening continuously overlappinglight-emitting areas emitting the same color light. For example, thepartition wall 250 may include a first opening OP1, which overlapsadjacent first light-emitting areas LA1 and a light-blocking area BAtherebetween, a second opening OP2, which overlaps adjacent secondlight-emitting areas LA2 and the light-blocking area BA therebetween,and a third opening OP1, which overlaps adjacent third light-emittingareas LA3 and the light-blocking area BA therebetween.

The partition wall 250 may overlap the light-blocking area BA betweenadjacent light-emitting areas emitting different color lights.

The light-blocking area BA between adjacent light-emitting areasemitting the same color light may overlap a plurality of color filters.

For example, the light-blocking area BA between adjacent firstlight-emitting areas LA1 may overlap the first color filter 222, thesecond color filter 224, and the third color filter 226. Furthermore,the light-blocking area BA between adjacent second light-emitting areasLA2 and between adjacent third light-emitting areas LA3 may overlap thefirst color filter 222, the second color filter 224, and the third colorfilter 226.

In an exemplary embodiment, a plurality of color filters are disposed inthe light-blocking area BA where the partition wall 250 is not disposed.As such, light leakage may be effectively prevented.

FIG. 14A is a plan view illustrating a color-converting substrateaccording to an exemplary embodiment. FIG. 14B is a cross-sectional viewtaken along line X-X′ of FIG. 14A. FIG. 14C is a cross-sectional viewtaken along line XI-XI′ of FIG. 14A. For ease of explanation, acolor-converting layer and a compensation layer are not illustrated.

Referring to FIGS. 14A, 14B, and 14C, first light-emitting areas LA1 maybe arranged along a first direction D1. Second light-emitting areas LA2and third light-emitting area LA3, which emit light having a colordifferent from the first light-emitting areas LA1, may be arranged alonga second direction D2 perpendicular to the first direction D1.

The first light-emitting area LA1 may overlap a first color filterselectively transmitting a first color light. The first color filter mayinclude a plurality of patterns 222 a and 222 b, which overlap adjacentfirst light-emitting areas LA1, respectively, and are spaced apart fromeach other.

The second light-emitting area LA2 may overlap a second color filter 224selectively transmitting a second color light.

The third light-emitting area LA3 may overlap a third color filterselectively transmitting a third color light. The third color filter mayinclude a plurality of patterns 226 a and 226 b, which overlap adjacentthird light-emitting areas LA3, respectively, and are spaced apart fromeach other.

For example, the first color light may be a red light, the second colorlight may be a blue light, and the third color light may be a greenlight.

A partition wall 250 is disposed on the color filters. The partitionwall 250 has an opening continuously overlapping light-emitting areasemitting the same color light. For example, the partition wall 250 mayinclude a first opening OP1, which overlaps adjacent firstlight-emitting areas LA1 and a light-blocking area BA therebetween, asecond opening OP2, which overlaps adjacent second light-emitting areasLA2 and the light-blocking area BA therebetween, and a third openingOP1, which overlaps adjacent third light-emitting areas LA3 and thelight-blocking area BA therebetween.

The partition wall 250 may overlap the light-blocking area BA betweenadjacent light-emitting areas emitting different color lights.

The light-blocking area BA between adjacent light-emitting areasemitting the same color light may overlap a plurality of color filters.

For example, the light-blocking area BA between adjacent firstlight-emitting areas LA1 may overlap the second color filter 224. Thelight-blocking area BA between adjacent third light-emitting areas LA3may overlap the second color filter 224. The light-blocking area BAbetween adjacent second light-emitting areas LA2 may overlap a dummypattern 222 c of the first color filter.

In an exemplary embodiment, the color filter may not continuously extendacross adjacent light-emitting areas emitting the same color light, andmay include separated patterns corresponding to each of thelight-emitting areas. As such, a color filter may be partially removedin the light-blocking area BA between adjacent light-emitting areasemitting the same color light. As such, a volume of the opening may beincreased such that more ink drops may be received therein. In thismanner, a thickness distribution of a color-converting layer and acompensation layer due to distribution of ink drops may be reduced.

FIG. 15 is a cross-sectional view illustrating a display deviceaccording to an exemplary embodiment.

Referring to FIG. 15 , a display device includes a display panel and abacklight assembly 600. The display panel includes a first substrate 100and a second substrate 200.

The first substrate 100 includes an array of pixels. A liquid crystallayer 500 is interposed between the first substrate 100 and the secondsubstrate 200.

A pixel includes a driving element TR and a pixel electrode PEelectrically connected to the driving element TR. The second substrate200 includes a common electrode CE. However, the inventive concepts arenot limited thereto. For example, the common electrode CE may beincluded in the first substrate 100.

A first alignment layer AL1 may be disposed on the pixel electrode PE. Asecond alignment layer AL2 may be disposed on the second substrate 200.The first and second alignment layers AL1 and AL2 may include a polymersuch as polyimide, and may be treated by rubbing or photo-orientation tohave a predetermined tilt angle or the like.

The second substrate 200 may have substantially the same configurationas one of the color-converting substrates described above, except forfurther including the common electrode CE and the second alignment layerAL2.

A pixel voltage is applied to the pixel electrode PE in response tooperation of the u) driving element TR. A common voltage is applied tothe common electrode CE. Orientation of liquid crystal molecules in theliquid crystal layer 500 is adjusted by an electric field formed by adifference between the pixel voltage and the common voltage. As such, atransmittance of light L1 provided by the backlight assembly 600 may becontrolled.

The second substrate 200 includes a color-converting layer, whichchanges a wavelength of light L1 passing through the liquid crystallayer 500 to emit light having a color different from the incident lightL1. Furthermore, the second substrate 200 includes a color filteroverlapping the color-converting layer.

For example, the second substrate 200 includes a color filter layerdisposed on a surface of a base substrate 210. The color filter layermay be disposed between the base substrate 210 and the color-convertinglayer. The color filter layer may filter light passing therethrough tooutput light having a specific color.

In an exemplary embodiment, the color filter layer may include a firstcolor filter 222, a second color filter 224, and a third color filter226. The color filters may overlap a corresponding light-emitting area.As such, colors of light L2R, L2G and L2B exiting from thelight-emitting areas may be determined by their color filters.

In an exemplary embodiment, the first color filter 222 overlaps thefirst light-emitting area LA1. For example, the first color filter 222may selectively transmit a red light. The second color filter 224overlaps the second light-emitting area LA2. For example, the secondcolor filter 224 may selectively transmit a blue light. The third colorfilter 226 overlaps the third light-emitting area LA3. For example, thethird color filter 226 may selectively transmit a green light.

As described above, a color-converting substrate may be used for a lightcrystal display device as well. Furthermore, exemplary embodiments maybe used for various display devices, which may use a color-convertingsubstrate, such as an electroluminescent display device, a micro LEDdisplay device or the like.

Exemplary embodiments may be applied to various display devices. Forexample, exemplary embodiments may be applied to vehicle-display device,a ship-display device, an aircraft-display device, portablecommunication devices, display devices for display or for informationtransfer, a medical-display device, etc.

According to one or more exemplary embodiments, a partition wall may notbe disposed in a light-blocking area between adjacent light-emittingareas emitting the same light. As such, the total number of ink dropsprovided in each opening of the partition wall may be increased, whichmay reduce volume distribution of the ink drops. As such, thecolor-converting layer and the compensation layer formed in the expandedopening may have a reduced thickness distribution.

Furthermore, a color filter having a different color from an outputlight of an adjacent light-emitting area is disposed in thelight-blocking area where the partition wall is removed. As such,deterioration of a display quality due to light leakage may beprevented.

Although certain exemplary embodiments and implementations have beendescribed herein, other embodiments and modifications will be apparentfrom this description. Accordingly, the inventive concepts are notlimited to such embodiments, but rather to the broader scope of theappended claims and various obvious modifications and equivalentarrangements as would be apparent to a person of ordinary skill in theart.

What is claimed is:
 1. A color-converting substrate comprising:light-emitting areas and a light-blocking area surrounding thelight-emitting areas, the light-emitting areas including firstlight-emitting areas configured to emit a same color light and spacedapart from each other by the light-blocking area; a partition wallincluding a first opening continuously overlapping the firstlight-emitting areas and a first portion of the light-blocking areadisposed between the first light-emitting areas; a firstcolor-converting layer including a wavelength-converting material anddisposed in the first opening to overlap the first light-emitting areasand the first portion of the light-blocking area; and a color filterlayer including a portion configured to block a first color lightemitted through the first light-emitting areas, the color filter layeroverlapping the first color-converting layer and the first portion ofthe light-blocking area.
 2. The color-converting substrate of claim 1,wherein: the light-emitting areas further include second light-emittingareas configured to emit a second color light different from the firstcolor light; and the color filter layer includes: a first color filteroverlapping the first light-emitting areas and configured to transmitthe first color light; and a second color filter overlapping the secondlight-emitting areas and the first portion of the light-blocking areaand configured to transmit the second color light.
 3. Thecolor-converting substrate of claim 2, wherein the first color filterfurther overlaps a second portion of the light-blocking area disposedbetween the second light-emitting areas.
 4. The color-convertingsubstrate of claim 3, further comprising a compensation layeroverlapping the second light-emitting areas and the second portion ofthe light-blocking area, and configured to transmit an incident lightwithout changing a wavelength of the incident light.
 5. Thecolor-converting substrate of claim 4, further comprising a secondcolor-converting layer including a wavelength-converting material andoverlapping third light-emitting areas and a third portion of thelight-blocking area disposed between the third light-emitting areas, thethird light-emitting areas being configured to emit a third color lightdifferent from the first color light and the second color light; and thecolor filter layer further includes a third color filter overlapping thethird light-emitting areas and configured to transmit the third colorlight.
 6. The color-converting substrate of claim 5, wherein the firstcolor light is a red light, the second color light is a blue light, andthe third color light is a green light.
 7. The color-convertingsubstrate of claim 5, wherein the second color filter further overlapsthe third portion of the light-blocking area.
 8. The color-convertingsubstrate of claim 5, wherein the third color filter further overlapsthe third portion of the light-blocking area.
 9. The color-convertingsubstrate of claim 4, wherein: the partition wall further includes asecond opening in which the compensation layer is disposed; and thefirst opening and the second opening have different sizes.
 10. Thecolor-converting substrate of claim 1, wherein: the color filter layerincludes a first color filter overlapping the first light-emitting areasand configured to transmit the first color light; and the first colorfilter includes a plurality of patterns spaced apart from each other andoverlapping the first light-emitting areas, respectively.
 11. Thecolor-converting substrate of claim 1, wherein the wavelength-convertingmaterial includes a quantum dot.
 12. The color-converting substrate ofclaim 1, wherein the first color-converting layer disposed in the firstopening has a single pattern shape continuously overlapping the firstlight-emitting areas and the first portion of the light-blocking areatherebetween.
 13. A display device comprising: a first substrateincluding an array of pixels and an encapsulation layer covering thepixels, each of the pixels including a driving element disposed on abase substrate and a light-emitting element electrically connected tothe driving element; and a second substrate combined with the firstsubstrate and including light-emitting areas and a light-blocking area,the light-emitting areas including first light-emitting areas configuredto emit a same first color light and second light-emitting areasconfigured to emit a same second color light different from the firstcolor light, wherein the first light-emitting areas are spaced apartfrom each other by the light-blocking area, wherein the second substratefurther includes: a partition wall including a first openingcontinuously overlapping the first light-emitting areas and a firstportion of the light-blocking area disposed between the firstlight-emitting areas; a first color-converting layer including awavelength-converting material and disposed in the first opening tooverlap the first light-emitting areas and the first portion of thelight-blocking area; a first color filter overlapping the firstlight-emitting areas and configured to transmit the first color light;and a second color filter overlapping the second light-emitting areasand the first portion of the light-blocking area and configured totransmit the second color light.
 14. The display device of claim 13,wherein the first color filter further overlaps a second portion of thelight-blocking area disposed between the second light-emitting areas.15. The display device of claim 14, wherein the second substrate furtherincludes a compensation layer overlapping the second light-emittingareas and the second portion of the light-blocking area, and configuredto transmit an incident light without changing a wavelength of theincident light.
 16. The display device of claim 15, wherein: thelight-emitting areas further include third light-emitting areasconfigured to emit a third color light different from the first colorlight and the second color light; and the second substrate furtherincludes: a third color filter overlapping the third light-emittingareas and configured to transmit the third color light; and a secondcolor-converting layer including a wavelength-converting material andoverlapping the third light-emitting areas and a third portion of thelight-blocking area disposed between the third light-emitting areas. 17.The display device of claim 16, wherein the first color light is a redlight, the second color light is a blue light, and the third color lightis a green light.
 18. The display device of claim 16, wherein the secondcolor filter further overlaps the third portion of the light-blockingarea.
 19. The display device of claim 13, wherein the first color filterincludes a plurality of patterns spaced apart from each other andoverlapping the first light-emitting areas, respectively.
 20. Thedisplay device of claim 13, wherein the wavelength-converting materialincludes a quantum dot.
 21. The display device of claim 13, wherein thefirst color-converting layer disposed in the first opening has a singlepattern shape continuously overlapping the first light-emitting areasand the first portion of the light-blocking area therebetween.